Clarification: Oper. Conds Tab

ClarificationOperConds.jpg
Variable Definitions, Ranges and Default Values

The following table shows a brief description of the variables appearing in this tab. The table also displays their default values and their generally acceptable range:

Variable

Default Value

Range

 

○ a
Parameter of the built-in empirical model used to calculate the removal percentage of particulate components.

158.0

Positive

○ n
Parameter of the built-in empirical model used to calculate the removal percentage of particulate components.

0.2

Positive

○ m
Parameter of the built-in empirical model used to calculate the removal percentage of particulate components.

1.0

Positive

○ Removed ?
Check the box next to a component to indicate that the corresponding particulate component is removed.

<No>

Yes/No

◙ Removal %
The removal percentage of a particulate component.

0.0

0 – 100

○ Overflow rate (m3/m2-day)

32.0

Positive

○ Particle Diameter (microns)
The diameter of the limiting particle.

100

Positive

○ Particle Density (kg/m3)
The density of the limiting particle.

1,030

Positive

○ Power Type
Indicates the power type that is used by the operation. Click on the list box to bring up a list of available power types in order to select one.

<Std Power>

Any Power Type

● Power (kW)
The total power consumed for the operation (per cycle).

0.0

Positive

○ Particle Concentration in Sludge (g/L)
The concentration of suspended solids in the feed.

10.0

Positive

○ Liquid Viscosity (cP)
The viscosity of the feed.

1.0

Positive

● Detention Time (h)
The time a unit volume of the feed is in the basin.

2.0

Positive

● Solids Loading (kg/m2-day)
The mass flowrate of suspended solids in the feed per surface area of the basin.

0.0

Positive

Symbol Key: ○ User-specified value (always input); ● Calculated value (always output); ◙ Sometimes input, sometimes output

Specification Choices / Comments

The following list describes the available specification choices in this tab; for more details on how these are implemented, see Clarification: Modeling Calculations.

•Empirical Model Parameters...

The parameters {a, n, and m} are required when the removal percentage of particulate components is calculated by the built-in empirical model.

•Design Options...

In Design Mode of calculation, the sizing (calculation of the surface area) of the tank is based either on the overflow rate or the sedimentation velocity of a limiting particle whose properties (density and diameter) must be specified.